Under Labour rules, metro mayors and police and crime commissioners must seek the NEC’s permission to stand for parliament.
Burnham
said on Saturday afternoon he wanted to contest the seat after the sitting MP, Andrew Gwynne, said he intended to stand down.
While he had won support for the bid from a series of cabinet ministers, allies of
Keir Starmer warned against the disruption that could follow if Burnham, widely viewed as seeking to challenge the prime minister, re-entered parliament.
However, the decision to block him is likely to spark a huge backlash, with senior Labour figures including Ed Miliband, the energy secretary, and Lucy Powell, the party’s deputy leader, saying it would be wrong to block him.